1、 Explanation of commonly used terms
1.1 Supplementary water: For the water loss from the circulating cooling water system caused by evaporation, sewage discharge, and wind blowing (splashing) of the cooling tower, the necessary supplementary water is called supplementary water.
1.2 Evaporation loss: In an open circulating cooling water system, the hot circulating cooling water is cooled by evaporation in the cooling tower, and the amount of water lost during this process is called evaporation loss.
1.3 Wind blowing loss: The amount of water lost when the airflow is brought into the atmosphere from the system during ventilation.
1.4 Pollutant discharge or discharge rate: The amount of water discharged to maintain a certain concentration factor in the system.
1.5 Cooling range or temperature drop: The temperature difference between the inlet of the cooling tower and the outlet of the water collection tank.
1.6 Circulating water volume: The amount of circulating water in the system, which is a function of time.
1.7 Concentration factor (K): During the circulation process of cooling water, due to evaporation loss, the dissolved salts in the water continuously concentrate in the circulating cooling water system, causing the salt content in the cooling water to be higher than that in the supplement. The ratio of the two is called concentration factor.
1.8 System volume: The sum of all water capacities in an open cooling water system, including the effective volume of the cooling tower collection tank and the water side volume of the system pipeline and heat exchange equipment.
1.9 Total dissolved solids: The sum of all dissolved substances in water.
1.10 Alkalinity: The sum of bicarbonate, carbonate, and hydroxide in water.
1.11 Rs stability index: used to determine the scaling and corrosion trend of water.
2、 Term abbreviation:
2.1 Water replenishment rate: M
2.2 Evaporation loss: E
2.3 Wind blowing loss: D
2.4 Pollutant discharge or discharge rate: B
2.5 Cooling range or temperature drop: △ T
2.6 Circulation volume: R
2.7 Concentration ratio: K
2.8 System volume: HC
2.9 Total dissolved solids: TDS
2.10 Ryznar stability index: I.S
3、 Calculation
3.1 Concentration ratio:
K=(Conductivity in circulating water or K+or Na+) ÷ (Conductivity in supplementary water or K+or Na+)
3.2 Supplementary quantity:
M=E × K/(K-1)
M=B+E+D
3.3 Emissions:
B=E ÷ K × △ T
3.4 Time per cycle=HC ÷ R
3.5 Evaporation capacity:
E=R ×/ R
R (latent heat of evaporation)=573 (kcal/kg) 43 ℃
574 (kcal/kg) 40 ℃
577 (kcal/kg) 35 ℃
3.6 Wind loss:
D=R × 0.1%
